Cruddasia insignis Prain (1898: 287)

Song, Zhuqiu, Pan, Bo, Li, Bing, Xu, Dongxian & Li, Shijin, 2021, Millettia lantsangensis is conspecific with Cruddasia insignis (Fabaceae), Phytotaxa 497 (1), pp. 29-38 : 34

Cruddasia insignis Prain (1898: 287)

Type: MYANMAR. Kachin State: Myitkyina District, Kachin Hills , 1897, Shaik Mokim s.n. (lectotype, designated here: K000900334 !; remaining syntype: CAL0000010021 !, K000900335 !) .

= Millettia lantsangensis Z. Wei (1985: 277) ; Callerya lantsangensis (Z. Wei) H. Sun (2006: 409) , syn. nov. Type:— CHINA. Yunnan Province: Fohai (now Menghai County), 1325 m, July 1936, C. W. Wang 76171 (holotype: KUN0644549!; isotypes: A00149932!, LBG00091847!, NAS00071322!, PE01432520!, PE01432521!, WUK0047429!).

Herbaceous climbers; stems green, slender, terete, 2.2‒3.8 mm in diameter, sparsely to densely covered with retrorse, appressed hairs. Leaves pinnately 5-foliolate; rachis 11‒20 cm, including petiole 5‒12 cm, channeled above; petiolules 3‒5 mm; stipules narrowly triangular, 2.5‒3.5 × 0.8‒1 mm; stipels subulate, 1‒2.5 mm long; leaflets opposite, papery, ovate-lanceolate, 8.5‒17 × 3.5‒6.5 cm, entire along margin, acute at apex, cuneate to rounded at base, very sparsely hairy above, densely appressed hairy beneath; secondary nerves 9‒12 pairs, prominent beneath, not reaching the margin; lateral leaflets slightly small, slightly oblique. Pseudoracemes axillary, slender, 25‒53 cm long in open flower stage, densely covered with hairs; peduncle 7‒11 cm long; brachyblast bearing 5‒8 flowers, wart-like, about 1.5‒2 mm apart after flowering; primary bract linear, 2.8‒3.2 mm long, ca. 0.5 mm wide at base, inserted at base of brachyblast, caducous; secondary bracts, linear, 1.8 mm long, inserted at base of pedicle, caducous; bracteoles 2, ovate-lanceolate, ca. 1 × 0.5 mm, inserted at the base of calyx, persistent; pedicel 2‒3 mm long. Flower red to purple, ca. 1 cm long; calyx campanulate, 5-lobed, densely hairy outside, sparsely hairy on inner side; the three lower lobes triangular, ca. 2 × 2 mm; two upper lobes connate in a shortly 2-dentate upper lip; tube as long as the lobe; standard more-or-less asymmetric, suborbicular, ca. 9 × 10 mm, reflexed at base, emarginate at the apex, densely sericeous outside, with a yellow-green patch at base; wing oblong, ca. 7.4 × 2.5 mm, auriculate at base, with a 1.6 mm long claw; keel falcateoblong, obtuse at the apex, ca. 6 × 3 mm, with a 2.7‒3.0 mm long claw; stamens 10, monadelphous, ca. 9 mm long; anthers, oblong, ca. 0.6 × 0.3 mm; ovary sessile, sericeous, with sheathing floral disk at base; disk ca. 1 mm long; style inflexed; stigma capitate, more-or-less hairy. Pod linear, flat, coriaceous, 6–11 × 0.9–1.1 cm, slightly hairy when young, glabrescent when mature; pedicle 3–5 mm long. Seeds 6‒10, ellipsoidal, smooth, arillate, 4.8–5.7 × 4.0– 4.5 mm. Flowering from May to September, and fruiting from August to next January. It grows in evergreen or limestone forests at an elevation of 600–1700 m and dies back to ground in winter or dry season.